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https://issues.apache.org/jira/browse/LOG4J2-1051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15492772#comment-15492772
 ] 

Lukasz Lenart commented on LOG4J2-1051:
---------------------------------------

Confirmed, no more problems spotted, thanks!

> NoClassDefFoundError when starting app on Google App Engine
> -----------------------------------------------------------
>
>                 Key: LOG4J2-1051
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1051
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core
>         Environment: master branch, JDK7, Google App Engine, Apache Struts 2.5
>            Reporter: Lukasz Lenart
>            Assignee: Remko Popma
>             Fix For: 2.4, 2.7
>
>
> I have an app that uses
> - log4j-api
> - log4j-core
> - log4j-web
> and after deploying it to GAE I see such exception in the logs
> {noformat}
> 2015-06-10 23:01:05.768
> Uncaught exception from servlet
> java.lang.NoClassDefFoundError: Could not initialize class 
> org.apache.logging.log4j.core.util.Loader
>       at 
> org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:114)
>       at 
> org.apache.logging.log4j.core.config.AbstractConfiguration.<init>(AbstractConfiguration.java:105)
>       at 
> org.apache.logging.log4j.core.config.NullConfiguration.<init>(NullConfiguration.java:30)
>       at 
> org.apache.logging.log4j.core.LoggerContext.<clinit>(LoggerContext.java:62)
>       at 
> org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:145)
>       at 
> org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:70)
>       at 
> org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:57)
>       at 
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:142)
>       at 
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:42)
>       at org.apache.logging.log4j.LogManager.getContext(LogManager.java:175)
>       at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:426)
>       at 
> org.apache.struts2.tiles.StrutsTilesListener.<clinit>(StrutsTilesListener.java:50)
>       at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>       at 
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>       at 
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>       at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>       at java.lang.Class.newInstance(Class.java:375)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.newListenerInstance(WebXmlConfiguration.java:650)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.initListener(WebXmlConfiguration.java:631)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.initWebXmlElement(WebXmlConfiguration.java:368)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.initialize(WebXmlConfiguration.java:289)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.configure(WebXmlConfiguration.java:222)
>       at 
> org.mortbay.jetty.webapp.WebXmlConfiguration.configureWebApp(WebXmlConfiguration.java:180)
>       at 
> org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1247)
>       at 
> org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
>       at 
> org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
>       at 
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
>       at 
> com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:199)
>       at 
> com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:174)
>       at 
> com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
>       at 
> com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:527)
>       at 
> com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
>       at 
> com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
>       at 
> com.google.tracing.CurrentContext.runInContext(CurrentContext.java:230)
>       at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
>       at 
> com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
>       at 
> com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
>       at 
> com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
>       at java.lang.Thread.run(Thread.java:745)
> {noformat}



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